/Engine/Source/Runtime/Engine/Public/AudioDevice.h
Patch outputs are owned by theFPatchMixer, and are pinned by theFPatchInput.
typedef [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FPatchOutput](API\Runtime\SignalProcessing\DSP\FPatchOutput), ESPMode::ThreadSafe > FPatchOutputStrongPtr